Questions and Answers
What is the main purpose of a topographic map?
What do contour lines on a topographic map represent?
Why are contour lines on a topographic map crooked?
What is the analogy used to explain contour lines in the lesson?
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What is the relationship between topographic maps and geologic maps?
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What would be the shape of the path if you were to run around the base of a pyramid and then go up 10 feet to the first painted level of step and run around that?
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What do hachures on a topographic map represent?
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What do the lines on a topographic map represent?
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What is the primary difference between a topographic map and a geologic map?
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What do the colors on a geologic map typically represent?
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Why do topographic maps not put numbers on every line?
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What is the purpose of the key or legend on a geologic map?
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What is the purpose of index contours on a topographic map?
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Why do contour lines on a topographic map form circles around hills and depressions?
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What does the space between two contour lines on a topographic map represent?
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Study Notes
Topographic Maps
- A topographic map is a type of map that shows elevation.
- Topographic maps are used by people like hikers to know the elevation of an area.
Contour Lines
- Contour lines connect points of equal elevation.
- Contour lines are like the lines on a banana split, circling around the mountain peak.
- On a topographic map, contour lines are usually shown in a light brown color.
- Each contour line represents a different elevation.
Index Contours
- Index contours are contour lines with numbers on them.
- Index contours display the exact elevation of a specific line.
- Index contours are usually labeled only in two or three places to avoid clutter.
Contour Rules
- Contour lines cannot cross, as it would mean one location has two different elevations.
- Contour lines form circles around hills or depressions.
- The contour interval is the distance between two side-by-side lines.
- The closer the contour lines, the steeper the hill.
Hachures
- Hachures are small lines that show depressions or holes on a topographic map.
- Hachures look like teeth in an open mouth.
Geologic Maps
- A geologic map contains topographic lines and shows ages and types of rocks.
- Geologic maps show geologic features and have more information layered on top of the topographic map.
- Colors on a geologic map represent different types of rocks or ages of rocks.
- Black lines or markings on a geologic map are typically geologic markings.
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Description
Learn about topographic maps through a sweet analogy. Imagine a banana split with different layers representing different features of a topographic map.